However, a number of other features are needed, and a variety of specialised cloning vectors (small piece of DNA into which a foreign DNA fragment can be inserted) exist that allow protein production , affinity tagging , single stranded RNA or DNA production and a host of other molecular biology tools. (readtiger.com)

Occasionally, the term cloning is misleadingly used to refer to the identification of the chromosomal location of a gene associated with a particular phenotype of interest, such as in positional cloning . (readtiger.com)